Here there are lotta info about midi and wav file..... this will give u a through knowledge abt the files
*www.hitsquad.com/smm/news/9903_101/
hmm it's hard to find a freeware for it 'casue most of them are doing the vice versa...
here is one dat will solve the purpose but it's a demo version
*www.digital-ear.com/digital-ear/demo.htm
*www.recognisoft.com/
if u like it u can buy it after using the demo
..:: Peace ::..
Jeba